- are you using any filter?
- is the lens clean (front and back)?
- are you using a very small aperture in the second picture?
- did you use the hood in the third?

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-For the first and second image, no filter was used.
-I tend to clean my lens after every shoot but it may have had some finger prints in the second image.
-In the Second image, for what ever reason I was actually using f/13
-A polarizer was used for the third image, as well as a lens hood